... cont'd
The 1918 influenza pandemic (Spanish Flu) infected one-third (500 million) of the world's population (then 1.8 billion) & killed 50 million.
With such a high mortality rate this acute infectious disease took its toll, erasing from existence nearly 3% of all people on Earth.
This "long flu," an echo of sorts of the Spanish Flu epidemic itself, has its parallel in long COVID today - a similar cluster of symptoms that persist in those who were previously infected with COVID-19.
...